Hello! I’m Eduard from Vocabulary team.
There is definitely a problem with this branch of diagnoses. Acute coronary syndrome seems misplaced, as for Unstable angina — not sure if it belongs with acute disorders. Although it clinically may lead to acute infarctions or other acute disorders it itself is not a subtype of one.
All of these concepts are supplied by SNOMED CT. Entire Vocabulary is implemented in OMOP CDM ‘as is’, although we often encounter mistakes inside of it. Since SNOMED is updated by source following ever-changing guidlines regularly so we consider trying to implement and support our own fixes impossible at the time.
Instead at the time we collect reports and work with IHTDSO (organization maintaining SNOMED CT) to establish feedback process. We can’t say with confidence how soon changes can be applied. Could you please share your use-case so we could suggest a work-around in the nearest time?